shear



P. E. SHEAR.

Stove Door.

Patented April 21, 1868.

v No. 77,112.

19 Y 1 WM warms. PHOTO-UTHOBRLI5HER WASHINGTON u c utter tetra igttflltiffi se'.

P. SHEAR, OF SAI-IGYERTIES, NEWiYORK.

Letters Patent No. 77,112, dated April 21, 1868,

IMPROVEMENT Ill FUREAGE-D OOR'FASTENING- dig: stain rental: in in ilgtttgtitttrtfitttatt tut uniting ant at ilgt n.

TO ALL WHOM IT MAY oonennn;

Be it known that I, P. E. SHEAR, of Sanger-ties, in the county ofUlster, and State of New York, have inventeda new and improved Fasteningfor Furnace-Doors; and I do herehy'declarethat the following is full,clear, and exa'et description thereof, which will enable those skilledin the-art to make and use the same, 7

reference being had to the accompanying drawings forming part of thisspecification.

This invention relates to a new and improved fastening forfurnace-doors, whereby doors for this purpose may be tightly secured ina closed state, and very readily opened as well as readily secured in aclosed state. The invention in the present instance is shown applied toa door fitted in a mouth-piece provided with waterpassages, to admit ofa current of water passing through, to obviate the rapid burning out ofthe door and mouth-piece, but the invention is applicable to-doorsfitted in the ordinary frame or mouth piece.

In the accompanying sheet of draivings- I v Figure 1 is a front View ofa furnace door and frame, or mouth-piece, having my invention applied toit.

Figure 2, an edge view of the same.

Figure 3, a horizontal section of the same, taken in the line :0 wffig.1.

Similar, letters of reference indicate corresponding parts.

A represents a cast-iron frame or month, which is inserted in themasonry of the furnace, and is provided with water-passages or pipes, B,through which a current of water passes, to keep the frame ormouth-piece, and also the door C, in a cool state, or to resist the heatof the furnace and prevent said door and door-frame from rapidly burningout. e i

The door 0 is fitted between guides, a a, which are cast on the front ofthe frame-or mouth-piece A, the door being allowed to slide freely upand down between them. To one of these'gui'de's, a, there is connected,a hinge or joint, D, one end of a bar, E, which is of suificient lengthto extend entirely across the bar and the other guide a. The oppositeend of this bar E is forked, asshown at b, to receive a link, 0, whichis connected by a hinge or joint, d, to the guide a, the link cbeing ofsuflicient length to' admit of an eccentric, F, being fitted in it.

This eccentric is provided with a handle, G, and when the bar E isadjusted against the door C, and the link 0 fitted in the fork b ofsaidbar, by turning the eccentric in the proper direction, the eccentricwill press the bar'E firmly against the door 0, and hold the same in atightly closed state. v

The rear sides'oi' the guides a a are bevelled, as shown clearly in fig.3, and admit of the masonry of the furnace entirely covering it, whichgreatly protects it from injury by heat. In order to release the door,so that it can be opened, all that is required is to turn the eccentric,I eoas to relieve the bar E of its pressure, then move the link 0 out ofthe fork b of the bar, and move or turn the latter out from the door.

I claimas new, and desire to secure byLetters Patent The hinged orjointed bar E, in combination'with the hinged link a and the eccentric,F, all constructed, arranged, and applied to the frame or mouth-piece.of a. furnace, substantially as and for the purpose set forth.

' P. E. SHEAR.

Witnesses:

WILLIAM DEAN, Gnonen BURHAUS.

